package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorsMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.messaging.core.MessageSendingOperations;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

/**
 * @author Zhang Maojie
 * @date 2024/3/19 21:04
 */
@Service
@Slf4j
public class DishServiceImp implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    DishFlavorsMapper dishFlavorsMapper;
    @Autowired
    SetmealDishMapper setmealDishMapper;

    @Override
    @Transactional //事物，双表一致性
    public void saveWithFlavor(DishDTO dishDTO) {
        //菜品表插入
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.insert(dish);
        Long deshid = dish.getId(); //获取insert返回的主键值
        //口味表插入
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size()>0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(deshid);
            });
            dishFlavorsMapper.insertBatch(flavors);
        }
    }

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> p = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(p.getTotal(), p.getResult());
    }

    @Override
    @Transactional  //多表一致性
    public void deleteBatch(List<Long> ids) {
        //判断当前菜品是否能删？起售？套餐子项？
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if(dish.getStatus() == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if(setmealIds != null && setmealIds.size() > 0){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品及其关联的口味数据
//        for (Long id : ids) {
//            dishMapper.deleteById(id);
//            dishFlavorsMapper.deleteByDishId(id);
//        }
        //根据id集合批量删除菜品及其关联的口味数据
        dishMapper.deleteByIds(ids);
        dishFlavorsMapper.deleteByDishIds(ids);
    }

    @Override
    public DishVO getByIdWithFlavor(Long id) {
        Dish dish = dishMapper.getById(id);
        List<DishFlavor> dishFlavors = dishFlavorsMapper.getById(id);
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.update(dish);
        dishFlavorsMapper.deleteByDishId(dishDTO.getId());
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size() > 0) {
            flavors.forEach(flavor ->{
                flavor.setDishId(dishDTO.getId());
            });
            dishFlavorsMapper.insertBatch(flavors);
        }
    }

    @Override
    public List<Dish> getByCategoryId(long categoryId) {
        Dish dish = Dish.builder().categoryId(categoryId).status(StatusConstant.ENABLE).build();
        List<Dish> listDish = dishMapper.getByCategoryId(dish);
        return listDish;
    }

    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.getByCategoryId(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorsMapper.getById(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

    @Override
    public void startOrStopDish(Integer status, Long id) {
        Dish dish = Dish.builder().status(status).id(id).build();
        dishMapper.update(dish);
    }
}
